Want this question answered?
Follow the intake air plenum from the air filter. It connects to the carburetor. The carburetor is mounted on the intake manifold.
It's a constant source such as the intake manifold or the base of the carburetor.
It does not hook to the intake. It fits on the big vacuum port on the back of the carburetor.
It is a small 'L' shaped hose that goes from the side if the water manifold to the bottom of the carburetor intake manifold. I believe it is part of the water supply to the carburetor manifold that heats it.
To the intake manifold.
On the intake manifold
The intake is the tube that attaches to the engine - usually the carburetor is attached at the opposite end of the tube (intake).
Under the hood, on top of the intake manifold.
On an engine bolted to the intake manifold.
these are on the front of the carburetor after the intake
I think you will find that this truck is fuel injected and has no carburetor. If I am wrong and it has a carburetor it is mounted on top of the engine dead center on the intake manifold.
It is back beside the distributor, right were the distributor goes into the intake about 2 inches behind it.